Coffee-machine.



G. NELSON. COFFEE MACHINE.

APPLICATION FILED APR.24. 1901.

Patented Sept. 22, 191

r 0 t H e v n I Witnesses Attorneys.

THE NORRIS PETERS CO, PHOTO-L/THOU WASHINGTON o. C.

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CHARLES NELSON, 0F BROOKLYN, NEW YORK, ASEIGNOR TO S. STEBNAU & 00., OF NEW YORK, N. Y., A OOPARTNERSHIP CGMPOSEI) OF SIGMUND STERNAU AND LIONEL STRASSBURGEB.

corrnnivracnrnn.

Patented Sept. as, rare.

Application filed April 24, 1907. Serial No. 369,923. 1

To all whom it may concern:

Be it known that 1, CHARLES NELSON, a sub ect of the King of Sweden, residing in the borough of Brooklyn, county of Kings,

and State of New York, have invented an Improvement in Coffee-Machines, (Case (1,) of which the following is a specification.

. This invention relates to an improvement in a machine for making infusions of codes, tea and similar beverages. The invention is not limited to such use as it may be employed in connection with machines for other and analogous purposes.

The objects of the invention are to pro-- duce a device which has no moving parts, which is simple, cheap to construct, will not get out of order, and which may be readily and thoroughly cleaned.

Another object is to produce a device which will operate in the minimum of time and exposure to heat, and by means of which an infusion may be induced without bringing all of the water in the receptacle to a boil.

These and other objects will appear from the following drawings in which Figure 1 is a sectional view of a portion of a coffee machine embodying my invention. Fig. 2 is a side elevation of the lowerend of the percolator. Fig. 3 is a SECJlOIlELl View thereof. Fig. 4 is a sectional view on the line aa of Fig. 3.

In all of the several views like parts are designated by the same reference characters.

Tn carrying out my invention I provide a receptacle 1 for water or other liquid, with a screen 2, which latter is carried by the globe 3. The percolator shown generally at d extends up through the sieve or screen 2 and ends below the deflector 5. The percolator drives the liquid up against the deflector, which sprays and splatters it over the material which lies within the screen 2, thereby reducing the infusion, which sinks back into the receptacle 1. y

The percclator 4: rests within a chamber 6, which chamber is attached to the bottom of the receptacle 1 and communicates with thelatter. A plate 7 may be attached to the bottom of the chamber for the purpose of concentrating the heat in the spirit lamp or other source of heat employed and for preventing the flame coming into contact with the bottom of the receptacle. The per colator comprises a tube 8, which is vertical piece 11. The lower end of the tube 8 with a tight joint tothe tube 8 so that the liquid cannot enter the air chamber 9. 1 shown in Fig. 4-, the lower corrugated piece 11 is elliptical in cross-section, its longer diameter being substantially equivalent to the diameter of the chamber 6, such chamber .beingcylindrical in shape. The shorter diamcter of the p1ece 11 is less than the diameter oi": the chamber whereby passages 12 12 are produced on each side of the chamber between the inner wall thereof and the lower corrugated piece 11.

Tie operation is as follows: In making codes, the receptacle 1 is partly filled with water, and the coffee is placed within the screen '2. The water will enter the chamber 6 through the passages 12, and will rise in the tube 8 to the height of the level of the water within the receptacle 1, or slightly higher, as depends upon the effect of capil lary attraction. Heat is now applied to the bottom of the chamber 6 and plate 7 by any suitable means, as for instance, by means of aspirit lamp. In a very few moments the contents of the chamber 6 will be heated, expanding the liquid within the tube 8 and generating steam in the chamber 6. The tube 8 and the chamber 6 y are sufficiently small to prevent any considerable circulation of water from the lower end of the chamber 6 to the upper portion of the tube 8. The water in the lower part of the chamber 6 will very soon begin to boil, and the pressure of steam will force the liquid up the tube 8 against the deflector 5, where it will be sprayed and splattered over the cotfee in the screen '2, and will seep through the coffee and back into the receptacle. As soon as the pressure is released within the tube 8 by the liquid being driven out thereof at the top, the level within the tube will be restored by cold water entering the chamber 6 through the passages 12. This chamber 6 when it is driven out by the for-.

again will become heated and the operation will be repeated, and so on, until an infusion" of the desired strength is produced. Ordinarily this can be secured before the contents in the receptacle 1 has been brought to a boil, thus avoiding the injurious efiect's to the coffee by boiling it. The liquid will pass. out in the tube 8 more readily than out of the passage 12, as the'tube 8 is straight and of considerably larger cross-section than the passages 12; furthermore, one wall of each passage 12 is made up of corrugations of the piece 11. These corrugations act, to some extent, as bafiling'grooves and prevent the free passage of the liquid from the ing heated by convection from the chamber 6. The plate 7 not only concentrates the heat to the base of the chamber 6 but prevents the heat of the lamp from reaching the bottom of receptacle 1; therefore, by means of the plate 7 and the air chamber 9 the liquid in the bottom of .the receptacle 1 is not heated. I find that without'the chamber, or its equivalent, the eifects of the device are greatly inferior, and that the time required to secure the operation is much longer. j

The broad feature of the invention comprising a labyrinthine passage from the heating chamber to the receptacle is not claimed herein, but forms the subject matter of a pending application.

I In accordance with the provisions of the patent statutes, I have described the principle of my invention, together with the ap- Gopies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents, I

Washington, D. 6;

paratus which I now consider to represent the best embodiment thereof; but I desire to have it understood thatthe apparatus shown is merely illustrativefand that the invention can be carried out in other ways. Having now particularly described the nature of my invention, and lnwhat manner the same is to be performed, what I claim anddesire to secure by Letters Patent is: r

1. A percolator for coiieemachines having a central open-ended tubev and a hori-' Zontally corrugatedmember adj acent. to one end of the tube and-surroundingthe same, in combination with a heating chamber sur an open-ended heating chamber of circular cross-section, a percolator, the said percola tor having a member of elliptical cross-section extending into thechamber providing passages between the walls and chamber.

The combination of a receptacle with an open-ended heatingchamber of circular of such member cross-section, a percolator, thesaid percolatorhavlng a corrugated member of elllptical cross-section surrounding its lower end and extending into the chamber. 1

This specification signed and witnessed this 22nd day of April, 1907.

WVitnesses:

JOHN S. 'Lo'rsoH, EDWARD IRMSOHER.

CHARLES NELSON. a 

